/* 设置默认盒模型为替代盒模型 */
html {
    box-sizing: border-box;
}

*,
*::before,
*::after {
    box-sizing: inherit;
}

body {
    margin: 0;
    background-color: aliceblue;
}

header {
    margin-bottom: 20px;
    display: block;
    flex-direction: column;
    align-items: center;
    background-color: azure;
    box-shadow: 0 0 10px gray;
}

.navigator {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
}

h1 {
    padding-left: 10px;
}

.options {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-around;
    width:30vw;
}

.search-field {
    display:inline;
}

/* 正文课程卡片 */
.lesson-card {
    margin-bottom: 70px;
    margin-left: 10px;
    margin-right: 10px;
    padding: 10px;
    border-radius: 10px;
    background-color: white;
    box-shadow: 0 10px 40px gray;
}

h2 {
    margin: 0;
}

.tag {
    margin-top: 0;
    color: darkgrey;
}

.quote-symbol {
    margin: 0;
    font-size: large;
}

.comment-tag {
    margin: 0;
    color: gray;
    text-align: end;
}

.title-bar {
    display: flex;
    justify-content: space-around;
    align-items: center;
}

.like-it {
    display: flex;
    justify-content: end;
}

.like-wrapper {
    width: fit-content;
}

.like-button {
    display: inline;
}